The RadChart does not support aggregating data out-of-the-box, however you can relatively easy achieve that with a simple LINQ query like this:
group bookingObj by bookingObj.BookingDate.Month
into bookingPerMonth select
XVal = bookingPerMonth.First().BookingDate.Month,
YVal = bookingPerMonth.Sum(b => b.BookingValue)
(initialData is a List<BookingObject>, аnd the XVal and YVal properties of the PlotInfo class are numerical)
I have attached a sample project to help you get started.
I hope this helps.
All the best,
the Telerik team
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